ethyl (2(3H)-benzoxazolone-3-yl)acetate

tert-butyl 2-(2-oxobenzo[d]oxazol-3(2H)-yl)acetate

2-苯并唑啉酮

邻氨基苯酚

(2-氧代-1,3-苯并恶唑-3(2H)-基)乙腈